JP4307338B2 - Image processing device - Google Patents

Description

  The present invention relates to an apparatus configuration in an image processing apparatus, for example, an image processing apparatus such as a facsimile, provided with a common conveyance path for a document and a recording material.

  2. Description of the Related Art Conventionally, for the purpose of downsizing and cost reduction, there has been proposed an image processing apparatus, for example, a facsimile machine, in which a part of a document and recording material conveyance path is shared.

  FIG. 8 shows an example of the configuration. The image processing apparatus shown in FIG. 8 has an ASF unit 301 for separating and conveying recording materials one by one from a recording material bundle loaded on a loading table, and for separating and conveying documents one by one from a loaded document bundle. ADF section 302, ASF section 301 and auxiliary transport roller 303 for transporting the recording material or document transported from ADF section 302, main transport roller 304 for transporting the recording material or document at a predetermined speed, A discharge roller 305 for discharging the recording material to the outside of the apparatus, a scanner unit 306 for reading document data, and a recording unit 307 for forming an image on the recording material are provided. In the above configuration, the auxiliary conveyance roller 303, the main conveyance roller 304, the discharge roller 305, and the guide member that forms the conveyance path are used in common for the document and the recording material, thereby reducing the size and cost of the apparatus. For example, US Pat. No. 5,727,890 has proposed a facsimile having the above-described configuration (see Patent Document 1).

  A configuration has also been proposed in which recording material is fed from a cassette and a manual feed port by controlling the rotation and rotation of one feeding roller (see Patent Document 2). In the configuration described in Patent Document 2, the feeding roller is configured to be movable by rotating between two recording material stacking units, so that feeding can be performed from any stacking unit.

US Patent 5,727,890 JP 03-243545 A

  However, in the configuration of Patent Document 1, the scanner unit 306 is disposed on the upstream side of the main conveyance roller 304. Therefore, an auxiliary conveyance roller 303 is provided to assist the unstable conveyance speed of the ADF unit 302 and convey the document to the main conveyance roller 304. Accordingly, the discharge roller 305 is only used in common as compared with the case where the document and the recording material are constituted by different conveying means and a conveying path, and the cost reduction and the downsizing of the apparatus are insufficient.

  Further, in the configuration of Patent Document 2, the mechanism and control for rotating the feeding roller are complicated, and the separating means must be provided for each stacking means. Therefore, cost reduction and device miniaturization are still insufficient.

  Accordingly, the present invention provides an image processing apparatus that enables separation and feeding of both a document and a recording material by a pair of separation feeding mechanisms, and that can detect the document at low cost and reliably regardless of the presence or absence of the recording material. The purpose is to do.

In order to solve the above problems, a typical configuration of an image processing apparatus according to the present invention includes a document stacking unit for stacking a document, a recording material stacking unit for stacking a recording material, and the document stacking unit or the recording material. A feeding roller for feeding a document or a recording material from a stacking unit; a separating unit for separating the document or the recording material in cooperation with the feeding roller; a reading unit for reading an image of the document; and the recording A recording means for recording an image on the material, and a document detection sensor for detecting a document on the document stacking means, wherein the document stacking means and the recording material stacking means include the feeding roller and the separating means. is disposed between the width direction of the reference of the document stacking means and the recording medium stacking means is a one-sided reference, set in the reference plane device opposite side of the reference plane and the recording medium stacking means before Symbol original mounting means Is, the distance of the reference surface in the reference surface and the recording medium stacking means in document stacking means is set wider than the width of the largest recording medium the apparatus main body may carry, originals stacked on the original stacking means, The document detection sensor is set so as to partially overlap the recording material loaded on the recording material loading unit, and the document detection sensor detects the document in an area where the document loaded on the document loading unit does not overlap the recording material. Features.

According to the present invention, in the image processing apparatus having the reading unit and the recording unit, the feeding roller, the separating unit, and the conveyance path for separating and feeding the document and the recording material can be shared, and thus the apparatus Can be reduced in size and cost. Even though these elements are shared, it is possible to detect the original document inexpensively and reliably regardless of the presence or absence of the recording material. In the present invention, the reference position of the recording material and the document in the width direction is opposite to the left and right sides, and the set position of the document and the recording material is set so that the recording material does not come below a predetermined range from the reference side in the document width direction. The original detection sensor is arranged in an area where the original and the recording material do not overlap each other by shifting left and right. Therefore, even when both the original and the recording material are set, since there is a sufficient space below the original, a highly reliable original detection sensor can be arranged with the cheapest configuration of a photo interrupter and an actuator.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. .

  FIG. 1 is a cross-sectional view showing the configuration of an image processing apparatus according to an embodiment of the present invention, using a facsimile apparatus as an example. The facsimile apparatus 100 shown in the figure is in a state where a recording material P and a document S are set. The facsimile apparatus 100 includes an image recording unit 101 including a cartridge 1 as an example of a recording unit, an image reading unit unit 102 including an image reading unit 28 as an example of a reading unit, and a plurality of set recording materials. An automatic feeding unit 103 that separates P and original S one by one and conveys them to the image recording unit 101 or the image reading device unit 102 is formed.

  Downstream of the automatic feeding unit 103, a PE sensor lever 21 (Page End sensor lever) for detecting the recording material P (or the document S), a predetermined speed in the image recording unit 101 and the image reading unit 102. And a discharging unit for discharging the sheet on which recording and reading operations have been performed to the outside of the apparatus. The conveyance unit includes a conveyance roller 10 including a metal shaft and a rubber roller, and a plurality of pinch rollers 16 arranged in the sheet width direction biased by the conveyance roller 10. The discharge portion is composed of a discharge roller 17 in which an elastomer is integrally formed on a plastic shaft, and a spur 18 biased by the discharge roller 17. A platen 3 is provided as a sheet passing surface from the sheet passing surface of the ASF base 80 to the discharge roller 17. A plurality of ribs 38 are formed on the recording material support surface of the platen 3 in the recording material width direction so that the recording material P passes through the upper surfaces of the plurality of ribs 38 when the recording material is conveyed. It has become. As described above, the conveyance path from the feed roller 81 to the discharge roller 17 is a common conveyance path through which both the document and the recording material pass.

  The image recording unit 101 is of an ink jet recording system in which ink is ejected from the cartridge 1 for recording. The cartridge 1 is mounted on the carriage 4 and scans in the width direction orthogonal to the conveyance direction of the recording material P. In this embodiment, the present invention is applied to a serial type recording apparatus that moves the recording head in the main scanning direction. The present invention is directed to a full-line type recording apparatus that records an image by a recording head while continuously conveying the recording sheet using a recording head extending over the entire width direction of the recording sheet. Can also be applied.

  The image reading unit 28 of the image reading device unit 102 holds a contact image sensor (hereinafter referred to as CS22) that is an image reading unit, a CS holder 26 that is a member that holds CS22, and a CS holder 26 that faces the CS22. The white reference member 25 is provided. The image reading unit 28 is normally in a standby position separated from the platen 3 (standby state). When the apparatus main body receives a command for reading an image such as copying or transmission, the image reading unit 28 is rotated in a direction indicated by an arrow by a driving unit (not shown) to move to a reading position facing the platen 3 (reading state). By providing the image reading unit 28 in the movement path of the carriage 4 as described above, the size of the entire facsimile apparatus can be reduced. During the image recording operation, as shown in FIG. 1, by moving to a standby position outside the moving area of the carriage 4, there is no interference with the moving space of the carriage 4.

  The document fed to the image reading unit 102 is conveyed to the image reading unit 28 by the conveying roller 10 and the pinch roller 16 used in common with the recording material. The document S is ejected out of the apparatus while being read by the image reading unit 28 while being nipped and conveyed by the conveying roller 10 and the pinch roller 16, and the discharge roller 17 and the spur 18.

(Automatic feeding section)
The automatic feeding unit 103 will be described. FIG. 2 is a perspective view showing the automatic feeding unit in a state where no document and recording material are set, FIG. 3 is a front view showing the automatic feeding unit in a state where no document and recording material are set, and FIG. FIG. 5 is a schematic sectional view showing the movement of the pressure plate and feeding roller of the automatic feeding unit, FIG. 6 is a front view for explaining the state during feeding, and FIG. It is a schematic sectional drawing explaining the separation mechanism of a separation part.

  As shown in FIG. 2 and FIG. 4A, an ASF base 80 that is a frame of the automatic feeding unit 103 includes a base surface 80a, a right side plate 80b, a left side plate 80c, and a document S and a recording material P when set. The front end reference surface 80d and the paper passing surface 80e are provided.

  A feeding roller 81 and a pressure plate 82 are rotatably attached to the right side plate 80b and the left side plate 80c via bearings. The pressure plate 82 is urged toward the feeding roller 81 by a pressure plate spring 83 attached between the back surface of the pressure plate 82 and the base surface 80a of the ASF base 80.

  2 and 5, a driving cam 81b is provided on the shaft of the feed roller 81, and a driven cam 82a is provided on the pressure plate 82. As shown in FIG. 5A, the pressure plate 82 functions as a pressing member for pressing a bundle of recording materials P or originals S toward the feeding roller 81 by a pressure plate spring 83 during feeding. Further, as shown in FIG. 5B, the driven cam 82a is pushed down except during feeding, and a gap for setting a document and a recording material is formed between the pressure plate 82 and the feeding roller 81. Functions as a recording material stacking means. In other words, the pressure plate 82 is brought into and out of contact with the rotation of the feeding roller 81, and the drive cam 81b and the driven cam 82a constitute a separating and contacting means.

  A sensor flag 81a is integrally formed on the shaft of the feed roller 81, and is engaged with an ASF sensor (not shown) so that the phase of the feed roller 81 can be known. The cross section of the feed roller 81 is a so-called D-cut roller having an arc portion 81d and a straight portion 81c. The feeding roller 81 is fed so that the separation pad 84 as an example of the separating means and the linear portion 81c face each other when the pressure plate 82 is separated (FIG. 4 (a)), and the feeding roller 81 feeds the pressure plate 82 when energized. The semicircular phase of the drive cam 81b and the roller is designed so that the circular arc part 81d of the roller 81 comes into contact (FIG. 4B).

  A separation pad 84 is affixed to the center of the front end of the pressure plate 82, and the separation pad 84 and the feeding roller 81 are in a positional relationship facing each other in a biased state during feeding. Further, as shown in FIG. 5, the separation pad 84 slightly protrudes toward the feeding roller 81 from the recording material stacking surface 82b. In this embodiment, the separation pad 84 protrudes by the thickness of the maximum set number of documents.

  A separation roller 93 as an example of a separating unit is disposed downstream of the nip position between the feeding roller 81 and the separation pad 84 so as to contact the feeding roller 81. The separation roller 93 includes a torque limiter and is configured so as to be able to come in contact with the feeding roller 81. As shown in FIG. 7, the automatic feeding device in the present embodiment is separated through a two-stage separation unit including a front separation unit and a main separation unit. The pre-stage separation includes a separation pad 84 of the pressure plate 82, a feeding roller 81, and a separation bank 132. The separation bank 132 is a bank formed so that the gap between the feeding roller 81 and the sheet passing portion formed in the ASF base 80 is about 1 mm. For example, when 50 recording materials are set, The 50 recording materials are separated into several sheets by the separation bank 132 and conveyed to the main separation unit 131. The main separation unit 131 includes a feeding roller 81 and a separation roller 93, and separates several sheets sent by the preceding separation by the above-described operation.

  A platen 85 as an example of a document stacking unit is detachably attached to the pressure plate 82 at a predetermined distance (with a space) from the recording material stacking surface 82b. A document bridge right 86 and a document bridge left 87 are rotatably mounted on the document table 85. With the document table 85 attached to the pressure plate 82, the leading ends of the document bridges 86 and 87 are in contact with the recording material loading surface of the pressure plate 82. It is regulated by the recess 80f of the ASF base 80 so as to leave a predetermined gap (FIG. 4 (a)).

  A recording material tray 8 is attached to the ASF base 80 in order to extend the recording material stacking surface starting from the pressure plate 82. Similarly, a document tray 88 for extending the document stacking surface is fixed to the document table 85. A slip prevention member 89 is attached to the front end (rear end in the transport direction) of the document tray 88. The length supported by the document tray 88 and the document table 85 is about 2/3 of the total length of the A4 size. When an A4 size document is set, 1/3 of the trailing edge is free. In the case of soft paper, the trailing edge hangs down by its own weight as shown in FIG.

  As shown in FIG. 3, a side guide 90 is attached to the pressure plate 82 so as to be slidable in the direction of arrow C that intersects the conveying direction of the recording material P by the feeding roller 81. A document slider 30 is also attached to the document table 85 so as to be slidable in the direction of arrow C. When setting the recording material, with respect to the width direction, the recording material width direction reference surface 91 formed on the pressure plate 82 is abutted against the right side of the recording material, the left side is regulated by the side guide 90, and the tip is the tip reference surface 80d. The entire recording material is supported by the recording material tray 8 and the recording material loading surface 82b of the pressure plate 82 (FIGS. 1 and 3). On the other hand, when a document is set, the left side of the document is abutted against the document width direction reference surface 85a formed on the document table 85 in the width direction, the right side is regulated by the document slider 30, and the tip is supported by the tip reference surface 80d. The entire document is supported by a document tray 88, a document table 85, and document bridges 86 and 87 (FIGS. 1, 3, and 4).

  The recording material width direction reference surface 91 and the document width direction reference surface 85a are arranged on the left and right sides of the apparatus, respectively, and are relatively shifted by about 30 mm in the width direction. Therefore, when both the recording material and the document are set, even when the maximum width recording material is set, the recording material does not exist on the lower side of the document within a range of about 30 mm from the reference side of the document ( FIG. 3). A sensor for detecting the presence or absence of a document is arranged in an area where the recording material is not set. The sensor is composed of a DS actuator 92 rotatably supported by a holder (not shown) and a photo interrupter. When a document is set, the document 92 and the arm 92a come into contact with each other to rotate the actuator 92, and the photo interrupt is performed. The mechanism is ON / OFF (FIG. 1). The document bridge left 87 has a bifurcated tip, one of which is on the set recording material and the other 87b is in a position without the recording material. . Then, the arm of the DS actuator 92 moves through the two crotch portions (FIG. 2).

  When only the recording material is set, the original S is removed in FIG. When the feed roller rotates, the pressure plate 82 is moved in a direction urged by the feed roller 81 by the drive cam 81b (FIG. 5B), and the uppermost recording material P and the feed roller 81 come into contact with each other. At this time, the document bridges 86 and 87 are at the upper part of the recording material, but are located above the feeding roller in the width direction, so that they are retracted above the feeding roller so as not to interfere with separation ( 2 and 3).

  When both the document S and the recording material P are set, the state shown in FIG. When the feeding roller rotates, the pressure plate 82 is moved in a direction urged by the feeding roller 81 by the driving cam 81b (FIG. 5B), and the document S is urged through the recording material P, and the uppermost position. Of the original S comes into contact with the feeding roller 81. At this time, the document bridges 86 and 87 are sandwiched between the recording material P and the document S, but the separation pad 84 protrudes from the recording material stacking surface 82b as shown in FIG. Since 86 and 87 have escaped the feed roller 81 in the width direction, a predetermined urging force acts between the document S and the feed roller 81 without causing extra deformation of the document. In the range of about 30 mm on the reference side of the document S, there is no recording material P on the lower side, but since it is supported by the document bridge left 87, it does not hang downward. This is because the document bridge left 87 is bifurcated as described above, and one of them is placed on the set recording material P and its position is regulated. The document can be supported in accordance with changes.

  When only the document S is set, as shown in FIG. 6B, the document S is directly urged against the pressure plate 82 and the uppermost document S comes into contact with the feeding roller 81. At this time, the document bridges 86 and 87 are sandwiched between the pressure plate 82 and the document S. However, since the separation pad 84 protrudes from the recording material stacking surface 82b, the separation pad 84 and the document bridges 86 and 87 are substantially omitted. The height is the same, and a predetermined urging force acts between the document S and the feeding roller 81 without causing unnecessary deformation of the document. If the separation pad 84 and the recording material stacking surface 82b are at the same height, the document is moved in the width direction by the thickness of the document bridges 86 and 87 in order to bias the document S to the feeding roller 81. It is necessary to transform with. Then, the urging force of the pressure plate 82 is used to deform the document S, and an appropriate urging force does not work on the feeding roller 81, which may cause a feeding failure.

  As described above, according to the present invention, the document stacking unit or the recording material stacking unit feeds the document or the recording material, and the document or the recording material is separated in cooperation with the feeding roller. By providing the separating means and the conveyance path through which both the original and the recording material pass, the apparatus configuration can be shared, and the apparatus can be reduced in size and cost.

  Further, since the above configuration separates the uppermost paper from the set recording material or document and conveys it to the reading means or recording means, the recording material is separated and conveyed when only the recording material is set. When the original is set on the recording material, the original is separated and conveyed. Therefore, in order to determine whether the automatic feeding unit has separated the original or the recording material, it is essential to detect whether the original is set. If the document is set, it is determined that the document is separated. If the document is not set, it is determined that the recording material is separated. Therefore, in the present invention, the reference position in the width direction of the recording material and the original is set to the left and right sides, and the set position of the original and the recording material is set so that the recording material does not come below the predetermined range from the reference side in the width direction of the original. The document detection sensor is arranged in an area where the document and the recording material do not overlap each other by shifting left and right. Therefore, even when both the original and the recording material are set, since there is a sufficient space below the original, a highly reliable original detection sensor can be arranged with the cheapest configuration of a photo interrupter and an actuator.

  The present invention can be used in an image processing apparatus including a reading unit and a recording unit.

It is sectional drawing which shows the structure of the image processing apparatus which concerns on an Example. FIG. 5 is a perspective view showing an automatic feeding unit in a state where a document and a recording material are not set. FIG. 6 is a front view showing an automatic feeding unit in a state where a document and a recording material are not set. It is sectional drawing which shows the state in which only the original document is set. It is a schematic sectional drawing which shows the motion of the pressure plate and feeding roller of an automatic feeding part. It is a front view explaining the state at the time of feeding. It is a schematic sectional drawing explaining the separation mechanism of a separation part. It is a figure which shows the example of the conventional image processing apparatus.

Explanation of symbols

P ... Recording material S ... Original 1 ... Cartridge 3 ... Platen 4 ... Carriage 8 ... Recording material tray
10… Conveying roller
16… Pinch roller
17… discharge roller
18 Spur
21… PE sensor lever
22… CS
26… Holder
28 ... Image reading unit
30 ... Original slider
38… ribs
80… ASF base
80a ... Base surface
80b ... right side plate
80c… Left side plate
80d ... Tip reference plane
80e ... paper surface
80f ... recess
81 ... Feed roller
81a ... Sensor flag
81b ... Driving cam
81c… Linear part
81d ... Circular arc part
82… pressure plate
82a… driven cam
82b ... Recording material loading surface
83… Pressure plate spring
84… Separation pad
85… manuscript table
85a ... Document width direction reference plane
86… Original bridge right
87… Original bridge left
88 ... Document tray
89… Prevention member
90… side guide
91… Recording material width direction reference plane
92… DS actuator
92a ... Arm
93… Separation roller
100 ... facsimile machine
101 ... Image recording unit
102 ... Image reading unit
103… Automatic feeding section
131… This separation part
132… Separate bank
301… ASF Department
302 ... ADF
303 ... Auxiliary transport roller
304… Main transfer roller
305… discharge roller
306 ... Scanner unit
307… Recording section

Claims (3)

A document loading means for loading a document;
Recording material loading means for loading the recording material;
A feeding roller for feeding a document or a recording material from the document stacking unit or the recording material stacking unit;
Separating means for separating the document or the recording material in cooperation with the feeding roller;
Reading means for reading an image of the document;
Recording means for recording an image on the recording material;
An original detection sensor for detecting an original on the original stacking means;
Said original mounting means and the recording material mounting means are disposed between the feed roller and the separating means, the width direction of the reference of the document stacking means and the recording medium stacking means is a one-sided reference, prior SL document The reference surface of the stacking unit and the reference surface of the recording material stacking unit are set on the opposite side of the apparatus, and the distance between the reference surface of the document stacking unit and the reference surface of the recording material stacking unit is the maximum recording that can be carried by the apparatus main body. Set wider than the width of the material, the document loaded on the document stacking means is set to partially overlap the recording material loaded on the recording material stacking means,
The image processing apparatus, wherein the document detection sensor detects a document in an area where the document stacked on the document stacking unit does not overlap a recording material. The document detection sensor includes an arm that rotates in contact with a document loaded on the document stacking unit, and a photo interrupter that is turned on / off by the rotation of the arm. The arm is stacked on the document stacking unit. The image processing apparatus according to claim 1 , wherein the original is in contact with the original in an area where the original does not overlap the recording material . The document stacking means supports a document by a document table and a document bridge rotatably attached to the document table, the document bridge has a bifurcated tip, and the arm moves on the bifurcated crotch portion. The image processing apparatus according to claim 2, wherein the image processing apparatus is configured .

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